diff --git a/flake.nix b/flake.nix
index e906c47..4eb5caf 100644
--- a/flake.nix
+++ b/flake.nix
@@ -195,7 +195,7 @@
             commonArgs
             // {
               inherit cargoArtifacts;
-              cargoNextestExtraArgs = "--bin mdkd";
+              cargoNextestExtraArgs = "--lib --bin mdkd";
             }
           );
         };
diff --git a/justfile b/justfile
index 7810376..59eed3d 100644
--- a/justfile
+++ b/justfile
@@ -94,9 +94,9 @@ integration-test *args:
 fix:
     cargo clippy --all-targets --fix --allow-dirty --allow-staged
 
-# Run tests (unit + doc; use `just integration-test` for integration tests)
+# Run tests (lib + bin unit tests; use `just integration-test` for integration tests)
 test *args:
-    cargo nextest run --bin mdkd {{args}}
+    cargo nextest run --lib --bin mdkd {{args}}
 
 # Run the server
 run *args: